/*
 * Copyright 2011-2012 by The Regents of the University of California Licensed
 * under the Apache License, Version 2.0 (the "License"); you may not use this
 * file except in compliance with the License. you may obtain a copy of the
 * License from
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package edu.ucsd.db.bassarisk.query;

import edu.ucsd.db.bassarisk.exception.VisitorException;
import edu.ucsd.db.bassarisk.query.ast.SyntaxExpressionVisitor;
import edu.ucsd.db.bassarisk.query.ast.SyntaxExpressions.SyntaxExpression;

public class AstQuery {
  private SyntaxExpression root;

  public AstQuery(final SyntaxExpression root) {
    this.root = root;
  }

  public <R extends TransformReturn<SyntaxExpression>, A> R
      applyTransformation(final SyntaxExpressionVisitor<R, A> visitor, final A arg) {
    try {
      R retValue = this.root.accept(visitor, arg);
      this.root = retValue.getTransformationRoot();
      return retValue;
    } catch (VisitorException e) {
      throw new RuntimeException("Internal Error", e);
    }
  }

  public <R, A> R applyVisitor(final SyntaxExpressionVisitor<R, A> visitor,
                               final A arg) {
    try {
      return this.root.accept(visitor, arg);
    } catch (VisitorException e) {
      throw new RuntimeException("Internal Error", e);
    }
  }
}
